a question to which the literal answer is, "between the 'is' and the 'at'." Sometimes, albeit rarely, the proper answer depends upon what the meaning of the word 'it' is. Considered obfuscating by some posing the defined expression.

Prosecutor: "Where's it at?" (meaning the missing 10 million dollars in question)
Indicted guy: "Between the 'is' and the 'at'."
Prosecutor: "Isn't that not an incomplete sentence and rather literal and evasive?"
Indicted guy: "Oh, you're good! Touché! Next question."